has not been able to enter benghazi to investigate the murders. he calls the situation "bizarre" and demanding answers. the letter seas, 18 days ago the administration said it was appropriate for our consulate to be lightly guarded. what has changed in such a short time that the f.b.i. and lead investigative personnel cannot safely enter the city? >> there are calls for the resignation of u.n. ambassador susan rice who said a few day after the attack it appears to be a spontaneous uprising again the antimuslim video. >> we have reports now that intelligence people knew in 24 hours this was a terrorist attack. yet they sent her out to say things that were absolutely false and continued to do so. >>reporter: john mccain says the violent conflict with -- the violence in libya conflicts with obama administration's story that al qaeda is on the way out. >>heather: good questions, steve. how is the administration defending itself? >>reporter: they claim that the event was so complex. they did not know for sure it was a terrorist attack. they were waitin